Sewing-machine for felling.



W. ARBETTBR.

SEWING MACHINE FOR PELLING.

' APPLICATION FILED AUG. 2a, 1902.

Patented Sppt. 6, 1910.

6 SHEETS-SHEET 1' W. ARBETTER.

SEWING MACHINE FOR TELLING.

APPLICATION FILED AUG. 23, 1902.

Patented Sept. 6, 1910.

6 SHEETS-SHEET 2.

ZQL/Z LM' W. ARBETTER.

SEWING MACHINE FOR FELLING.

APPLICATION FILED was, 1902.

969,740. Patented Sept. 6, 1910.

5 SHEETS-SHEET 3- W. ARBBTTER.

SEWING MACHINE FOR TELLING.

APPLICATION I'ILED AUG. 23, 1902.

969,740. Patnted Sept. 6, 1910.

6 BEEETB-SHEBT 4.

W. ARBETTER. SEWING MACHINE FOR PELLING.

APPLIOATION FILED 1 .86.23 1002.

96 9,740. Patented Sept. 6,1910.

5 SHEETS-SHEET 5 'wikessesz fivero vfi,

we arzeeew, fiance/ 5 Z UNITED STATES PATENT OFFICE.

"WO F ARBETTER, or CHELSEA, MASSACHUSETTS, ASSIGNOR '10 annn'r'rnn FELLING MACHINE COMPANY, OEBOS'ION, MASSACHUSETTS, A CORPORATION 01* MAINE.

SEWING-MACHINE FOR FELLING.

Specification of Letters Patent.

Patented Sept. 6, 1910.

Application filed August 23, 1902. Serial No. 120,760.

To all whom it may concern:

Be' it known that I, WOLF Annn'r'run, a v citizen of the United. States, residing at Chelsea, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Sewing-Machines for Felling, of which the following description, in con- .nection with the accompanying drawings,

is a specification, like letters on the draw- 10 ings representing like parts.

This invention is intended as an improvement on the machine shown and described in United States Patent No. 690,385, granted to me J an-nary 7 1902. The patent referred 1 5 to shows a work support on which is laid material forming part of a garment and hereinafter designated as body material, and on saidv body material is laid a l-ining or what I will hereinafter designate as suao rimposed material its edge being inolded. This material is fed away from the operator and the point of the curved eyepointed needle at one thrust meets the upper side of the body material, and at the next '25 thrust the u per side of the superim osed material bac of its edge, and thence le in ,said patent in its movement to penetrate the 'material moves from its highest point at the left-downwardly toward the right, the point 89 of the needle moving toward the operator,

, the looptaker occupyin a position next the operator and between t e operator and the axis of, the lever carrying the curved eyepointed needle, Owing to the relative positions' of the needle and loop-taker show-n vin said patent, the operation of the stitchforming elements was in a measure concealed from the eye of the operator and the stitch was apt to be imperfect and irregu- 40 lar as it was impossible at speed to insure the needle penetrating theupper side of the t superimposed material at the same distance back from its folded edge, as is essential in this class of work where the stitch must be uniform. In my novel machine to be herein described and claimed, I have reversed theposition of the needle and loop-taker so that the loop-taker is located back of the needle in the direction of the feed of the material over thework support, and the needle in its penetrating stroke is moved from the right downwardly toward the left in the dijnent of the needle when making its-diagonalrectionof the movementv of the material (by the feeding mechanism, and theneedle-ca"rrying lever is'so sustained that'a's the needle Qne part of my invention, therefore, con 110' makes its thrust'toenter the superimposed layer, it starts from a position above the main layer and its ointis moved toward the folded edge of t e superimposed layer, the point of the needle enterin the latter 0 layer at its folded edge and passing through the upper side of said superim osed layer at a point back from its 'folde edge, the action of a needle moved in this manner resulting in improving the character and de--e5 slrabi ity of the fe ing or blind stitch to be made 'on the machine, the stitching being .more satisfactory in appearance becauseonly the second or loop-ta er thread -is laid across and exposed on the edge of the su erimposed layer while the needle threa is 1concealed by the edge of the superimposed ayer.

In the patent referred to the stitch frame has a vertical shaft provided at its lower end with a bearing in which turns the shaft upon which is mounted the hub of the needle-carrying lever, and said vertical shaft was rocked at alternate stitches to thereby change the line of approach of the curved eye-pointed needle to the work, by a cam having a groove at its top side entered by a roller stud carried by a slide connected at its opposite end with a link inturn connected wlth a projection from said vertical shaft, and in said patent the needle penetrated the material twice-between each feeding'movement, and the needle at all times moved first in a straight and then in a diagonal path relatively to the folded edge ofthe superimposed material, and there was no provision whatever made for operating the machine for stitching with the needle moving only in its diagonal thrust. Herein the cam for moving the vertical shaft sustaining the axis of the needle-carrying arm is made as a face cam sustained by the stitch frame, and provision has been made to suspend the rocking movement of said vertical shaft when it is desired that all the strokes of the needle shall be diagonal with relation to the folded edge of the superimposedmaterial and the length of the seam, asi'fllustrated for example in Fig. are 16. Provision is also herein made to vary'the extent of the oscillation of said A vertical shaft to change the path of move thrust into .the superimposed'material.

sists in the combination with a needle and complemental stitch-forming mechanism, of means for maintaining and operating the needle above the work-support in a plane fixed with relation to the work support and diagonal to the line of feed, and to cause it to enter, and emerge from, the upper surface body of the stitch frame; Fig. 2 is an endview lookin at the machine shown in Fig.

' 1 from the right; Fig. 2 is a detail showing theshape of the groove in the disk D; Fig. 2 is a detail of the link 6 and its attached ball-headed stud; Fig. 3 is a partial front side elevation; Fig. 4 is a plan view showing the upper end of the bar in which the shaft carrying the needle is moved together with its arm and coacting part; Fig. 5 is a detail, showing part of the bar C with its attached cam finger and lifting device; Fig. 5 shows a detail of the rock shaft carrying the nee-1 dle; Fig. 6 shows enlarged and in detail a part of the end of the machine looking at the same from the left, Fig. 3; Fig. 7 is an enlarged detail partially 1n section on the line 00, Fig. 6, the work support being o1nitted;-Figs. 8, 9 and 10 are details of the work support and resser foot, with the work in position; Flgs. 11 and 12 are plan views showing part of the presser foot and work support;'Fi s. 13, 14.- and 15' are details .showing the nee lein the act of making stitches in the folded edge of a material being attached to a main layerthe'reof; Fig. 16 shows a modified stitch. Fig. .16 is a' section of Fig. 16 in'the line wf; Figs. 1722 show the hook and bobbin casein difierent positions; Fig.2?) shows the face of the loop .taker alone, and Figs. 24-26 show the bobbin case detached, Fig. '25 being in section on the line (n Fig. 24%.

The bed A has rising from it a goose-neck A havin suitable bearings A A A for an uprig t shaft f and the part A of a compound shaft to be described, the other. parts being a link A 'and a shaft A, the link being knuckle-jointed to each of the parts A", A". The part A of the compound shaft is sustained, see Fig. 1, in bearings A extended forwardly from a cross-head B clamped to a stitch-frame B by ablock A' and screws '2", see Fig. 3-, said stitch-frame 6,0

being fitted to be-slid vertically in bearings extended forwardly from the gooseneck A. The cross head B at its outer end has connected with it a depending arm C,

' and attached to its rear side by screws 6 is a depending take-up guide G". The stitchframe B is provided respectively at its upper and lower ends with laterally extended arms B B each bored for the reception of a bar C that may both slide and rock in' said arms, said bar sustaining the stitch forming mechanism to be described. The stitch-frame B bored centrally from its lower end, as represented in dotted lines I 3, is slotted at a", near its upper end see Fig. 1, This slot receives a finger extended from a plate B attached to the'bearing B by screws B, see Fig. 3. The finger sustains the upper end of a spiral tension spring 3 inside the stitch frame B and shown by dotted lines Fig. 3, and the lower end of said spring engages the hooked end of a screw C having applied to it a nut C. The rotation of the nut strains the spring, thus causing the spring to act as a counterbalance to counterbalance substantially the weight of the stitch-frame B" and the parts attached to and carriedby it, said stitch-frame having extended from ita stud C that rests on the cam face of a lifting device 0 that when turned from its position Fig. 3 causes the lifting device to act upon the stud C and lift the stitch-frame B and its attached parts including the presser foot to be described,-that material may be inserted or removed. The stitch-frame B is kept in its bearings in the goose-neck by suitable;

toothed wheelC having projecting from one side thereof a needle swinging cam C The gear andcam are rotated by a pinion C fast on the part A of the-compound shaft, and in its'rotation the cam G acts upon a roller'2 of a stud 3 mounted in an.

arm 4: fast on the bar G a spiral spring a surrounding the bar C and fixed at one end to the cross head, see Fig. 3, the other end thereof contacting ,with the arm 4, keeping ,said roller normally pressed toward the acting edge of said cam. Below the arm 1 the bar C has connected with it by a suitable screw a a block a having a cam toe 60 that, as the bar C under the control of the spring, is moved to'cause the roller 2 to contact with the part'of the cam C of least height, meets the*inclined end of a lifting stud 5 sustained adjustably in the arm 13-. The contact of the toe 60' with this stud causes the bar C to be raised sufficiently to enable-.ithe-needle b to be described to be elevatedsufiiciently to' properly penetrate the work of greatest thickness as rovided for in said patent and as represente in Fig. 14. The bar C is also free to slide vertically in a'suitable bored hole in the cross head B. Above saidPcross head said bar is prov-ided'with a collar (1 that sustains a spring a the upper endof which acts it a stop a has connected with it by a pin b a bracket an arm a that overlaps a plate a connected with the arm B? by a screw a. The left hand end of this plate, Figs. 1 and 4, is forke'dto embrace'a guide a rising from the bearingB, and to com ensate for'wear the forked end of the late 18 provided with.

a set screw a The p ate a has rising from The, lower end of the bar C b thatfisustains a short rock shaft 11, shown detached in Fig. 5. TlllS rock shaft is 'slottted at its'left hand end, Fig. 3, and to its right hand end is connected the hub of the needle carrier b having a curved needle I). The end of the needle carrier 1)? sustains .a thread guide I) from which the thread is led through the eye of the needle Mb. The thread comes to the thread guide I) from the eye of a-take-up D, the thread going to the take-up from any suitable usual tension 7), The slotted end of the rock shaft 11' receives in it one end of a link 6, jointed thereto by a stud b. The opposite end of the link I), see-Fig. 2", has extended from it a stud 6 havin a ball-shaped head. This head is embraced y a two-part clamp b properly shaped to fit the ball loosely.

The clamp is carried by a rod b jointed at its upper endtoastud b of a crank b",

shown as a plate having a hole to fit the end of the part A of the compound shaft, said plate being slotted at'lO to receive a'screw 12 entered into a threaded hole of disk D whereby .by changing the position of theplate the crank .pin may be varied to'pro- 'Y material, which latter is fed practically in- .the direction of flthe movement of the needle asit enters the material, said needle enteringthe body materialiat one Ithrust while' at the next thrustthe needle enter'sthe edge of the superimposed material and passes through the up er side thereof, the material being fed pre erably after each diagonal thrust of the needle.

The portion C depending from' the cross head B receives a stud 7 over which is fitted the end of the take-up lever D. This lever has a roller stud 8 that enters the cam roove 8" cut'in the rear face of the disk I see Fig. 2.

' The arm B receives at its rear side, see

Fig. 1,-"screws c that serve to attach to said arm a frame 0, see Fig. 2, the lower end 0 of which receives the shaft e carrying nee le.

part A of the compound 'tlieloo -taker or hook containing a covbal ofthread. The rib 67 enters a groove in the inner wall of the bobbincase. The exterior ofthe loop-taker has a shoulder 68 that catches one-half of the loop of needle thread a and carries it aboutthe bobbin case. The bobbin case has a projection 0 see Fig. 18, that co-acts with a suitable notch, see Fig. 6, at the rear side of abar 30, thus preventin the rotation of the bobbin case with the oop-taker, the latter having a point IO -a'nd a heel 12", the point ofthe loop-taker depending or being bent downwardly so that-it lies nearly flush with the under side of the part of the loop-taker of larger diameter. The shank 0 of the loop-taker is provided with a beveled gear a. that is engaged by a bevel ear a at the lower-{ end of the diagonal shaft 0" the shaft 0 has a bevel gaged and rotated by a evel gear 0 fast on the shaft A, said loop-taker in practice being rotated constantly and having two com lete rotations to each thrust of the The loop-taker and the needle are both located above the work-support, the needle occupying a .position' between the operator and the resser-foo't, while the loop-taker is locate at the" rear sideof the presser-foot and behind the axis of motion of the needle-carrying arm and the axis of rotation of the loop-taker 1s m the vertical plane in which the feeding device is moved when feeding the work over the work-support.

32 to the lowerend of which is connected in suitable manner thepresser-foot 31. This resser-foot, shown enlarged in Figs. 8-12, has at its side nearest the operator a pro- .jection 34 the .under side of which acts on the body material m of single thickness, the same resting directly upon the work-support, the latter, as herein shown, being composed of two plates 12., I suitably attached to a part of the frame-work by screws k said plates being represented as so located .as to present an apex at their upper ends over which the material to be stitched is fed topresent an an lethat the needle may enter and emerge rom the same side of the material as-when blind stitchingis being done. Theupper side of the projection 34 sustained in suitable bearings 0 The upper endof ear 0 that is en- The arm B has dependingfrom it'a-rod of the .presser-foot is so located with rela- I tion. to the apex of the work support as to serve the purposeof a needle-guide, saidv guide preventmg the point of the needle under any circumstances from springing outwardly in action due to rapid movements of the needle in stitching, the needle-guide insuring that the needle properly penetrates thematerial during the stitching ofythe aso same. The end 35 of the projection 3st from the presser-foot serves asan edge guide for the folded edge 36, see Figs. 1.1 and'12, of the superimposed material m, it being understood that said folded edge is to be at tached by blind stitches to the body material 711.. The presser-foot, see Figs. 11 and 1.2, is notched or cut away to form a space 3-10 in which the'material m to be penetratedby the needle is presented by the apex of the work supportv that the needle may enter and emerge from the upper side of the material as when making blind stitches. As herein shown, thetop of the work support serves to present the material m in the space 340 of the presser-foot, and the presser-foot at the rear-side of said space has a projection 38 shownas provided with a concavity 341, the deepest and Widest part of-which is next said space in which the needle enters after having passed through the material, the un:

der side of said projection 38 acting on the superimposed layer m sustained by the body layer, the latter resting on the worksupport, and said projection 38 has attached to it by a screw 13 a spring 37 which thus becomes a part of the presser-foot and is extended forwardly over the apex of the worksupport, said spring acting on the ridge made in the superimposed material formed v by bending the same over the apex of the work support, said material entering the space 340 of the presser-foot.

The dotted lines Fig. 10 show part of the needle b or the arc in which it moves, and

-.said figure represents theneedle as passing through the body material m present over the apex of the work support, the needle en tering and emerging atsuch time from the same side of the material, the needle during each thrust crossing and being guided by the upper side of the projection 84 of the presser-foot, the point of the needle after passing through the material entering the concavity before referred to. Viewing Figs.

8, 11 and 12, it will be seen that the folded edge of the superimposed material m rests on the upper side of thebody material m, and that the needle may enter a bight of the body material resting on the work support, the apex thereof serving to present the material upwardly and hold the same in the space 340 of the presser-foot and above the top of the projection 34 of the resser-foot. Figs. 8, 9, 11' and 12 show the fo ded edge of the superimposed layer m" as occupying a position in or above the guide over whlch the point of the needle travels in its diagonal thrust, as shown in Fig. 12, where the nos, and starts from a position above the body material and moves, toward the folded edge of the superimposed material presented in said space 340 of the presser-foot, the

needle entering said. foldededge close to the body material and passing through said superimposed material emerges therefrom from its upper side back of its edge, making the switch shown in- Figs. l3 and 14k, where it will be remembered the parts are much enlarged to better illustrate the interlooping of the threads in making the stitch.

It will be understood that the cam C carried by the stitch frame B having the arms B B acting through the roller 2, serves to turn the rod C and the stitch forming mechanism so that the needle I) may enter the material at at one thrust, see Fig. 13, the needle at that time working in a circle preferably parallel with the folded edge of the material 411., and at the next thrust the needle will enter said folded edge, as shown in Fig. 14-, the path of movement of the needle at this thrust, that it may enter the edge of the fold, being changed so that the arc in which the needle moves is diagonal to the folded edge, andit is while the needle is working in its diagonal path and about to enter the foldedsedge that the lifting stud 5" operates to raise the bar C upwardly in its guideways in the stitch frame against the action of the spring a, said spring yielding more or less according to the position occupied by said stud.

It will be understood that the bar C is free to slide in itsbearings, and as the needle b penetrates the material it might jump and fail to properly enter the material, were it not for the pressure of the spring a. The latter spring acts to enable thev needle to enter uniformly and steadily the material of. whatever thickness and density. The spring a therefore performs the purpose of not only keeping the cam toe' pressed in contact with the lifting stop when the needle is about to enter the edge of the folded material, but also will insure a defined position for the point of the needle and prevent the needle from rising unduly as the point of the needle is about to enter-the material.

- The cross bar 30 connectedfwith the shank. 32 of the presser foot isunited at its opposite ends with the frame a carrying the hook. The axis of the shaft o of the hook occupies a position in the vertical plane in which the feeding device works and if prolonged would intersect substantially the longitudinal axis of the rock shaft b constituting the center of motion of the curved needle. j i v j The bar C is turned ax'iallyby the cam C to place the needle I) in position to enter the material with a diagonal thrust as shown in Fig. 14. lVhen the roll 2 contacts with the straight face of the'disk-partof the cam C the needle is actuated to make its'socalled parallel thrust, Fig. 13, but as soon as.

' the point of the cam (I first to act meets the roller 2 the bar C is turned to secure for the needle its proper diagonal position with re I sequently the-needle ateach thrust will'pene trate the superimposed material at its] folded edge and emerge from *the upper side of i said material, the stitch being shown in Fig.

. where the loop [of thread carried by the 1' roller and bar C be turned by the spring a sufiiciently to turn the point end of the neelation to the infol ded edge of the material m. While the roller acts on the straight part 64 of the cam of greatest throw, see

Fig. 1, theneedle isthrust into the material andemerges therefrom,- as in Fig. 13 and at this time the incline 65 of cam C lets-the .dle about a center coincident with the longitudinal axis of the bar .0. This swinging movement of the needle in the material just preparatory to the point of the loop-taker entering the loop of needle threadhas been found very advantageous in preventing any possibility of skipping stitches. The point of the loop-taker having'entered the loop of .needle thread the needle is retracted while theroller 2bears on the second straight part 66 of the edge of 'cam C, and the needle havingbeen withdrawn, the incline 67 at the heel of cam C? passes the stud and immediately the spring a acts to further turn bar C? and put the needle in position to enter the fabric at its next thrust as-in Fig. 13.

It is very desirable for some kinds of stitching that the needle at each stitch approach the line of the-folded edgeof thematerial diagonally, making a stitch as shown in Figs. 16-and 16. To provide for stitch- .ing' with the needle moving only-in a diagonal direction with relation to the edge of the superimposed material and diagonally with relation to the direction in WlllCl'l the material-is'moved by the feed, I turn the bar G into such position that its roller 2 will be entirely out of the range of movement of the cam C" and while in this position I loosen the screw a see Fig. 2, and

turnthe arm a connected with said bar by said screw'until said arm meets the side of a stud a carried by the plate a, and I then turn in the screw to fix the arm'a in said T position, said arm thereafter acting to pre vent any oscillation of-the bar C and'con- 16 much exaggerated. The needle when held in its diagonal position and moved to penetrate the material will first'catch into the body material m, and then enter 'the superimposed material back of and under its folded edge, the needle passing out from the upper side of said superimposed material I needle will be locked by .a thread from the loop-taker, thus felling the folded edge of the superimposed material m to the body material m.

Viewing Fi .16'f I have shown the body material and t e superimposedmaterial laid thereupon to be united, and the edge of both materials as infolded, and in said figure ,th point of the needle enters the undermost .side of the. projection of the foot material and then passing therethrough enters the under. side of the up ermost mateprovided with two cams f, f. .The shafts f and f are connected by a link f through knuckle joints as represented by dotted lines in-Fig. 1. An extension A of the framework has erected upon it a guideway 14) held in position by a screw 14. This guideway receives the shank .of a slide 14. provided with a pin 15, and the slide has extended from it an adjustable stud 13 that bears on the cam f. The slide 12 has a stud 18 with lwhich is connilcte fl one end of a spring 9 t e op osite en 0 said spring being connected with a stud 19 extended from the guideway. The spring 9 acts to keep the stud 13 always in contact with the cam f. The stud 15 receives upon it loosely a lever 9 having connected with it two serrated or toothedv surfaces'16, 17, substan tially or nearly circular in shape, as represented in Fig. 6,.that'rise through slots'in said toothed surfaces rising to contact with the work feeding the same over the under the presser-foot, the latter being inserted between the material being stitched and the loop-taker, the toothed 1 surfaces rising ate of' the plates h, h, forming the work-support,

through the slots of the work-sup ort to engage'and feed the material, sai surfaces thereafter descending, retiring fromzthe material and moving backwardl thereon, preparatory to again engagingrt e material for another feeding action. he cam provides for the vertical movement of t e feeding device. The lever g is provided at its lower end with a stud 20 that entersa slot in an elbow lever g ivoted at g. The short arm 'of said elbow ever 9 is adapted to be acted upon by a screw 9, and by rotating the screw and turning it inwardly the upper end of the lever g may be moved to the right, viewing Fi 6,'to thus place a projection 45 of sai lever farther from the cam f", so that the efiective'action of the cam f is lessened and the length ofstitch shortened, as will be readily understood. The lever g has connected with it a spring 2 1- that' tends always to hold the lever' g pressed toward the" face of the cam f. The sooner the cam f" in'its rotation meets the level 9'' the longer will be the length'of stitchg- Having described my invention, what I claim and desire to secure by Letters Patent.is:

l. A blind-stitch sewing machine comprising a work-support; a reciprocating needle and coinplemental stitch-forming mechanism located above the work-support; means for feeding the material across the work-support; and means formaintaining and operating the needle above the worksupport in a plane fixed with relation to the work support and diagonal to the line of feed and to cause it to'enter, and emerge from, the upper surface of the material.

2,. A blind-stitch sewing machine comprising a work-support;- a reciprocating curved needle and com lemental stitchforming mechanism locate above the workmeans for feeding the material across the support; means for feeding the material across the work-support; and means for maintaining and operating the needle above the work-support 1n a plane fixed with 'relation to. the work supportand diagonal to the line of feed and to cause it toenter, and emerge from, the upper surface of the material.

3. A blind-stitch sewing machine com.- prising a work-support; a reciprocating needle and complemental stitch-forming mechanism located above the work-support;

work-support from the needle toward the complemental stitch-forming. mechanism; means for maintaining .and operating the needle above the work-support in a plane 'fixcd with relation to the Work support and diagonal to the line of feed and to cause it to enter, and emerge from, the upper surface of the material.

4. -A blind-stitch sewing machine comprising a work-support; a reciprocating curved needle and thread carrying looper cotiperating therewith locatedabove the work-support; means for feeding the material across the Work-support from the needle toward the thread-carrying looper; means for maintaining and operating" the needle above the work-support in aplane fixed with relation to the work su port and diagonal to the line of feed and to cause it to enter, and emerge from, the upper-surface of the material. I v

5. A'blind-stitch sewing machine comprising a work-support; a presser-foot having an opening for the material; -means for feeding the material over the work-support; a reci rocating needle and complemental stitchorming mechanism located above the presser-foot; means for -maintaining and operating the needle above the presser-foot in a plane fixed with relation to the work support and diagonal to the line of feed and to cause it to enter, and emerge from, the upper surface of the material presented at the presser-foot opening.

(3. A blind-stitch sewing machine comprising a work-support; a reciprocating needle and complemcntal stitch-forming mechanism located above the work-support; means for feeding the material across the worksupport; and means for maintaining and operating the needle-above the work-support in a plane fixed with relation to the work support and diagonal to the line of feed and to cause it to enter, and emerge from, the 11 per surface of the material; means for a justing toward and from'the work-support the position of the path of the need e through the material. i M

7 A blind-stitch sewing machine comprising a work-support; a resser-foot having an opening for the material; means for feeding the material over the work-support; a reciprocating curved needle and a threadcarrying looper cooperating therewith located above the presser-foot; means for maintaining and operating the needle above the presser-foot in a plane-fixedwith rela-,

tion to the work support and diagonal to the line of feed and to cause it to enter, and emerge from, the upper surface of the material presented at the resser-foot opening; means .for adjusting toward and from the presser-footthe position of the path of the needle through'the material.

8. A blind-stitch sewing machine comprising a work-support; a reciprocating needle and complemental stitch-forming mechanism located above the work-support; means for feeding the material across the worksupport; and means for mainta'inin operating the needle above the wor -support in a plane fixed with relation to the work support and diagonal to the li'ne of feed; means for guiding material comprising a superimposed layer or layers present ing an edge past the stitching point with the material on both sides of said edge in the path of the needle, whereby the edge is felled to the underlying layer by a series of diagonal stitches entering and'emerging from the upper surface of the material.

9. A blind-stitch sewing machine compris- 10o and ing a work-support; apresser-foothaving an opening for the material; means for. feeding the material over the work-support; a reciprocating curved needle located above the presser-foot; operating means therefor to cause the needle to enter in the general direction of the feed, and emerge from the upper surface of the material presented at the presser-foot opening; a thread-carrying looper mounted above. the resser-foot at the rear of said opening, and operating means therefor to'cause it to cooperate with the needle; and means for moving the needle angularly with res ect to the looper and the line of feed to f orm alternately diverging stitches. v

10. A blind-stitch sewing machine comneedle to cause needle .the material over 'ment of the prising a work-support; means for feeding the work-support; a re ciproeating needle located aboi'e the worksupport; means fol-operating the needle to cause it to enter, and emerge from, the upper surface of the material: means for changing augularly the path of reciprocation of'the needle at alternate stitches: and complemental stitch-forming mechanism lo- 'ated above the work-support, fixed in position with respect to the angular moveneedle and eoii 'ierating therewith in both positions thereof.

l1. A blind-stitch sewing machine comprising a \vorlbsupport: means for feeding the material over the. work-support: a reciprocating curved needle located -above the work-support; means for operating the it to enter, and emerge from, the upper surface of, the material: means for changing augularly the path of reciprocation of the needle at alternate stitches; and eomplemental stitch-forming mechanism located above the wort-support, fixed in position with respect to the angular movement of the needle and cooperating therewith in both positions, thereof.

12. A blind-stitch sewing machine comprising a \vorlesupptn't: means for feeding the material over the work-support; a reciprocating needle located above the worksupport; means for operating the needle to cause it to enter, and emerge from. the upper surface of the material in the general direction of the feed; means for' changing angularly the path of reciprocation of the at alternate stitches: and complemental stitch-forming mechanism located above the work-support, fixedin position ect to the angular movement of the nee le and cooperating therewith 111 with res both positions thereof.

13. A blind-stitch sewing machine e0mprising a "work-support; a presser-foot lmving an opening for the material; means for feeding the material over the work-support; a reci rocating needle located above the presserneedle to cause'it to enter, and en'le-rge from, the upper surface of the material presented at the presser-foot opening; means for changing angularly .the path of reciprocation of the needle at alternate stitches; and eomplemental stitch-forming mechanism located above the presser-foot, fixed in position with respect to the angular movement of the needle and cooperating therewith in both positions thereof.

14. A blind-stitch sewing machine com-.

prising a work-support; a presser-foot having an opening for the material; means for feeding the material over 'the'v. or'k-support; a reciprocating curved needle located above the presser-foot; means for voperating the needle to cause it to enter, and emerge from,

oot; means for operating the theupper surface of the material presfit'ed 'at the Presser-foot opening; means for changing angularly the path of reciprocation of the needle at alternate stitches; and con'lplemental stitch-forming mechanism located abovethe'pressenfoot, fixed in position with respect to the angular movement of the needle and cooperating therewith in both positions thereof.

15. A blind-stitch sewing machine comprising a work-support; a prcsser-foot havmg an opening for the material; means for feeding the material over the work-support; a reciprocating needle located above the Presser-foot; means for ope 'ating the needle to cause it to enter, and emerge from, the upper surface of the material presented at the prcsser-foot opening in the general direction of the feed; means for changing angularly the path of reciprocation of the new dle at alternate stitches; and complemental stitch-forming mechanism located above the presser-foot, fixed in position with respect to the angular movement of the needle and cooperating therewith in both positions thereof.

16. A blind-stitch sewing machine comprising a work-support; a presser-foot hav- .1ng an opening for the material; means for feeding the material over the wor t-support; a reciprocating curved needle located above the resser-foot; means for operating the need e to cause it; to enter, and emerge from, the upper surface of the material presented at the presser-foot opening in the general direction of the feed; means for changing angularly the path of reciproca-' tion of .the needle at alternate stitches; a thread-carrying looper located above the presser-foot at the rear of said opening and xed in position with respect to the angular movement of the needle; and means for 'op- 'eratingsaid looper to cause it to cooperate with the needle in both positions thereof.

17. A blind-stitch sewing machine com prising a work-support; a presser-foot havmg an opening in which is presented the material to be stitched and a needle guard in front of said opening; a curved needle; means to move the same in a curved path away from the operator and across said presser-foot; the needle penetrating the material prescnted'at the space of the pressez foot; combined with a loop-taker located at the rear side of the presser-foot and above the work-support controlling a second thread; and means to cause said loop-taker to cooperate with the needle.

-18. A blind-stitch sewing machine comprising a Work-support; a presser-foot havmg an opening in which the material to be'stitched is presented; said presser-foot having aneedle guard in front of said 0 ening; a curved needle located above an in front OfLSflid presser-foot opening; and comple'inental thread-carrying means-located be-' hind said resser-foot and above thematterial; and .means to actuate the needletof penetrate the material presented in the,

spaceof said presser-foot, said needle passing over said needle guardon its wayinto the material. 7

f '19. "A blind-stitch sewing, machinecom-p opening lllfWhlCh the body material and the folded, edge of the superimposed material s "presented; a curved needle; and complemental thread carrying means; andmeans to actuate said needle to cause i t,-at one thrust to enter the. body material and 1 emerge-from the same side thereof," and at the body material and ,move, toward the folded edge of said "superimposed material;

its next thrust to start with its, point above I penetrating said/edge and passing through:

1 the upper :side of said superimposed i I I ria hata pointbackfromits edge; v ahdfcomplemental stitch forming' mechanism85' 20; A blind-stitchsewing'machine com-I ptisin'g a'Ywork-support; means ifor'feeding':

thematerial. overthe work support;'vv a stitch frame means fonmoving the same verti-f gally'; .means toj guideithefsamerin its vlertical movement; a'bar freeato-jslide and oscil late in'said stitchira'me; -a rock-shaft jour-Q naledinsaid bar andfhavin-g :a connected] needle; means sustained i i-[said stitch-frameto actuate the said needle and oscillate saidbar at times torchange the direction of approach oft-heneedle with. relation to the'dimotion of feed andfcomp1emental stitch. forming mechanism carried by said stitch frameifl 211A blind-stitch sewing machine coinprising a work-support; 'a roclcshaft; a neel dle carrier-pivotally mounted on; said rockv sha'ftand provided with aneedle; means to 45 rock-shaft;,a"cam acting on said arm to'it .v a said rock-shaft'about its longitudinalfa a deviceactingnormally to maintaini sald' actuate 'sald carrier; 'an' armjfixcdtosaid arm in the path of movement of said cam; and a device toretain said rock-shaft in position wherethe arm will not-be acted upon bysaid cam to turnjsaid rock-shaft during j the-rotation of the cam, thus permitting the oscillation ofthe rock-shaft to be'suspended and the needle to make only what are nated as the diagonal stitches.

deSig- 22. A blind-stitch'sewing machine com-v prising a worksupport; an overhanging arm; a stitch frame slidably mounted in the stitch-fonning mechanism 1 end of said arm mechanism carried byi said]stitchframe;

- seam;

thrusts in glider-lent.vertical planes s 23. A blind-stitch sewing machine Com prising fa stitch fraineg 'means to guide thesame and ',allow of 1 its arert-ical' movement; a bar free to slide in said stitch-frame; a nee-f' \V-dle-carrying rocishaftsustained by, and

- movin'g with, sa'id bar' and provided witha.

connected needlegf'means tomove said stitch :frame' vertic a lly;- means sustained" by said .80- stitch--f1'ame to aetuatesaid needle andto'osucillate' said loar to c'hange the; direction 10f approach of the needle to the folded-edge of the material in whichstitches are toT-be made I carried by said stitchiframe'. I

24. blind-stitch sewing vmachine comi-prising a work-support; a stitch-frame; a armounted' looselyin'said stitch-frame; a

"bar and'havin'g a pivoted: needle .carrier' pro vided with a curvedneedle ;-jmea nsgsustained "in" said stitch-franieto' oscillate-said bar to change thendirect-ion of approach pf'the nee-1" means to actuate-said carrier and neang I whereby the oscillation of saidibar may hef h suspendedand comp'I'cmental' stitch formmg 25. A] ,blindstitcht's'ewing machine "06 vprising a work support"; j -'a",stitch fram means to movethe same vertically; a-slidi bar; a needle-carryingQrock-shaft sustained at the end'of said-bar; means-to move said i ing bar and acting normally t'o'hold the same toward the work-support as-the needle is .ja'bout to enterthemateria'l; said spring also insuring ,a defined position for the needle" a and preventing the same from jumping asllt) the point of the needle meets the material and complemental stitch forming mechanism carried by said stitch frame.

In testimony whereof, I havevsignedmy WOLF Annriiiqj -Witnesses-.: 1

G30. WV. GREGORY,

ED TH M. S'ronnAnn needle-carrying rockishaft sustained'ibydsaid 90, v

' dle to the work-support at alternatestitches; 9'5,

rock-shaft; a spring surrounding said slid-1 name to thisspeciiication, in the presence of two subscribing wltnesses. 

